Python 我想判断某个链接的 SSL 证书是否有效

巨 Python

import requests
import ssl
from datetime import datetime

def check_ssl_certificate(url):
    try:
        # SSL証明書の取得
        response = requests.get(url, verify=True)
        cert = ssl.get_server_certificate((url, 443))
        
        # 証明書情報を解析
        x509 = ssl.PEM_cert_to_DER_cert(cert)
        x509 = ssl.DER_cert_to_PEM_cert(x509)
        
        # 有効期限を取得
        x509_info = ssl._ssl._test_decode_cert(x509)
        valid_from = datetime.utcfromtimestamp(x509_info['notBefore'])
        valid_to = datetime.utcfromtimestamp(x509_info['notAfter'])
        
        # 現在の日時を取得
        current_time = datetime.utcnow()
        
        # 有効期限の比較
        if current_time >= valid_from and current_time <= valid_to:
            print("valid")
        else:
            print("invalid")
        
    except requests.exceptions.SSLError as e:
        print("can't receive the sslcertificate")

# チェックするURLを指定
url = 'https://www.google.com'

# SSL証明書の有効性を確認
check_ssl_certificate(url)

错误语句

Traceback (most recent call last):
  File "c:\Users\uc100\Programing\Python\Codingspace\everything\check.py", line 36, in <module>
    check_ssl_certificate(url)
  File "c:\Users\uc100\Programing\Python\Codingspace\everything\check.py", line 9, in check_ssl_certificate
    cert = ssl.get_server_certificate((url, 443))
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\uc100\Programing\Python\Python311\Lib\ssl.py", line 1527, in get_server_certificate
    with create_connection(addr, timeout=timeout) as sock:
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\uc100\Programing\Python\Python311\Lib\socket.py", line 827, in create_connection
    for res in getaddrinfo(host, port, 0, SOCK_STREAM):
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\uc100\Programing\Python\Python311\Lib\socket.py", line 962, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
socket.gaierror: [Errno 11001] getaddrinfo failed

I want to check if the SSL certificate for a certain link is valid by 巨 Python .However, an 错误语句 like the one shown above is output.I have no idea what the error message is saying, so please tell me if you know what it means.please.